net: check before dereferencing netdev_ops during busy poll

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Subject: net: check before dereferencing netdev_ops during busy poll
From: Matteo Croce <mcroce@xxxxxxxxxx>
Date: Fri, 28 Jun 2019 18:34:58 +0200
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, Josh Elsasser <jelsasser@xxxxxxxxxxx>, netdev <netdev@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>

Hi,

Is there any reason for this panic fix not being applied in stable?

https://lore.kernel.org/netdev/20180313053248.13654-1-jelsasser@xxxxxxxxxxx/T/

It seems that linux 4.9.184 has the bug too.

Regards,
-- 
Matteo Croce
per aspera ad upstream

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